Airtac SCJ50 Standard Cylinder SCJ50X100-40S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X100-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø50mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke100 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X100-40S
The SCJ50X100-40S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering 982 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides up to 40 mm of stroke-end reduction, allowing machine builders to fine-tune the piston stop position without swapping the cylinder or adding external hard stops. The 50 mm bore uses a 20 mm diameter piston rod and PT1/4 ports, with a body length A(SCJ) of 194 mm.
This model includes a built-in magnet, so standard CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The adjustable cushion decelerates the piston smoothly, and the tie-rod construction makes the unit serviceable. It operates on filtered air from 0.15 to 1.0 MPa and is a genuine AirTAC component for dependable industrial automation.
Airtac SCJ50 Standard Cylinder SCJ50X100-40S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X100-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCJ50 Standard Cylinder SCJ50X100-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -40 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCJ50 Standard Cylinder SCJ50X100-40S Is Used
Commissioning & Setup
Fine-tune the stroke end position during machine commissioning to perfectly align tooling, clamps, or stops, eliminating the need to stock multiple fixed-stroke cylinders for trial-and-error setup.
Wear Compensation
On high-cycle packaging or assembly lines, use the 40 mm adjustment to compensate for gradual wear on gripper pads or pusher faces, maintaining consistent contact force without immediate part replacement.
Format Changeovers
Quickly adapt to different product sizes on a single line by adjusting the cylinder stroke end for varying case widths or pallet stops, reducing changeover time between batches.
Is the Airtac SCJ50 Standard Cylinder SCJ50X100-40S the Right Cylinder?
Choose the SCJ50X100-40S when you need to dial in a precise stroke end during commissioning or after tooling wear, without the downtime of replacing a fixed-stroke cylinder. If your force requirement is lower, stepping down to a 40 mm bore reduces push force to 628 N at 0.5 MPa; for more power, the 63 mm bore provides 1559 N. This adjustable-stroke unit is ideal for applications where the stroke length must be empirically determined on the machine.
If your application requires a rigid, fixed stroke with no field adjustment, a standard SC50X100 cylinder is a more economical choice. For direct replacement, match the 50 mm bore, 100 mm nominal stroke, 40 mm adjust range, PT port thread, and the built-in magnet. Mounting accessories from the SCJ subset, such as the FA front flange or LB foot mount, can be added using the F-SC50 pattern.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ50 Standard Cylinder SCJ50X100-40S FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The maximum push force at the 0.9 MPa operating limit is 1767 N. Because it is a single-rod cylinder, the push force is greater than the pull force due to the rod area on the return side.
The rear cap has an adjusting screw that sets the stroke end position, allowing you to shorten the effective stroke by up to 40 mm. This is a mechanical stop adjustment, not a speed or force control. A fixed-stroke SC cylinder has no such screw and requires external stops for any stroke modification.
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